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Commit a7307bf2 authored by Andrew Victor's avatar Andrew Victor Committed by Russell King
Browse files

[ARM] 5259/2: [AT91] PWM LEDs on AT91SAM9263-EK 



Use the PWM controller and leds-atmel-pwm.c driver to drive a LED on
the Atmel AT91SAM9263-EK board.

Signed-off-by: default avatarSedji Gaouaou <sedji.gaouaou@atmel.com>
Signed-off-by: default avatarAndrew Victor <linux@maxim.org.za>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent bb1ad68b

arch/arm/mach-at91/board-sam9263ek.c

+17 −8
Original line number Original line Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include <linux/fb.h>

#include <linux/fb.h>

#include <linux/gpio_keys.h>

#include <linux/gpio_keys.h>

#include <linux/input.h>

#include <linux/input.h>

#include <linux/leds.h>





#include <video/atmel_lcdc.h>

#include <video/atmel_lcdc.h>
@@ -339,25 +340,32 @@ static struct atmel_ac97_data ek_ac97_data = { 
 * LEDs ... these could all be PWM-driven, for variable brightness

 * LEDs ... these could all be PWM-driven, for variable brightness

 */

 */

static struct gpio_led ek_leds[] = {

static struct gpio_led ek_leds[] = {

	{	/* "left" led, green, userled1, pwm1 */

	{	/* "right" led, green, userled2 (could be driven by pwm2) */

		.name			= "ds1",

		.gpio			= AT91_PIN_PB8,

		.active_low		= 1,

		.default_trigger	= "mmc0",

	},

	{	/* "right" led, green, userled2, pwm2 */

		.name			= "ds2",

		.name			= "ds2",

		.gpio			= AT91_PIN_PC29,

		.gpio			= AT91_PIN_PC29,

		.active_low		= 1,

		.active_low		= 1,

		.default_trigger	= "nand-disk",

		.default_trigger	= "nand-disk",

	},

	},

	{	/* "power" led, yellow, pwm0 */

	{	/* "power" led, yellow (could be driven by pwm0) */

		.name			= "ds3",

		.name			= "ds3",

		.gpio			= AT91_PIN_PB7,

		.gpio			= AT91_PIN_PB7,

		.default_trigger	= "heartbeat",

		.default_trigger	= "heartbeat",

	}

	}

};

};





/*

 * PWM Leds

 */

static struct gpio_led ek_pwm_led[] = {

	/* For now only DS1 is PWM-driven (by pwm1) */

	{

		.name			= "ds1",

		.gpio			= 1,	/* is PWM channel number */

		.active_low		= 1,

		.default_trigger	= "none",

	}

};







static void __init ek_board_init(void)

static void __init ek_board_init(void)

{

{
@@ -388,6 +396,7 @@ static void __init ek_board_init(void) 
	at91_add_device_ac97(&ek_ac97_data);

	at91_add_device_ac97(&ek_ac97_data);

	/* LEDs */

	/* LEDs */

	at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));

	at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));

	at91_pwm_leds(ek_pwm_led, ARRAY_SIZE(ek_pwm_led));

}

}





MACHINE_START(AT91SAM9263EK, "Atmel AT91SAM9263-EK")

MACHINE_START(AT91SAM9263EK, "Atmel AT91SAM9263-EK")

arch/arm/mach-at91/include/mach/board.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -175,6 +175,7 @@ extern void __init at91_add_device_isi(void); 
 /* LEDs */

 /* LEDs */

extern void __init at91_init_leds(u8 cpu_led, u8 timer_led);

extern void __init at91_init_leds(u8 cpu_led, u8 timer_led);

extern void __init at91_gpio_leds(struct gpio_led *leds, int nr);

extern void __init at91_gpio_leds(struct gpio_led *leds, int nr);

extern void __init at91_pwm_leds(struct gpio_led *leds, int nr);





/* FIXME: this needs a better location, but gets stuff building again */

/* FIXME: this needs a better location, but gets stuff building again */

extern int at91_suspend_entering_slow_clock(void);

extern int at91_suspend_entering_slow_clock(void);

arch/arm/mach-at91/leds.c

+39 −2
Original line number Original line Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/kernel.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/init.h>

#include <linux/platform_device.h>





#include <mach/board.h>

#include <mach/board.h>

#include <mach/gpio.h>

#include <mach/gpio.h>
@@ -21,8 +22,6 @@ 




#if defined(CONFIG_NEW_LEDS)

#if defined(CONFIG_NEW_LEDS)





#include <linux/platform_device.h>



/*

/*

 * New cross-platform LED support.

 * New cross-platform LED support.

 */

 */
@@ -55,6 +54,44 @@ void __init at91_gpio_leds(struct gpio_led *leds, int nr) {} 
#endif

#endif









/* ------------------------------------------------------------------------- */



#if defined (CONFIG_LEDS_ATMEL_PWM)



/*

 * PWM Leds

 */



static struct gpio_led_platform_data pwm_led_data;



static struct platform_device at91_pwm_leds = {

	.name			= "leds-atmel-pwm",

	.id			= -1,

	.dev.platform_data	= &pwm_led_data,

};



void __init at91_pwm_leds(struct gpio_led *leds, int nr)

{

	int i;

	u32 pwm_mask = 0;



	if (!nr)

		return;



	for (i = 0; i < nr; i++)

		pwm_mask |= (1 << leds[i].gpio);



	pwm_led_data.leds = leds;

	pwm_led_data.num_leds = nr;



	at91_add_device_pwm(pwm_mask);

	platform_device_register(&at91_pwm_leds);

}

#else

void __init at91_pwm_leds(struct gpio_led *leds, int nr){}

#endif





/* ------------------------------------------------------------------------- */

/* ------------------------------------------------------------------------- */





#if defined(CONFIG_LEDS)

#if defined(CONFIG_LEDS)